Radeon HD 5770 vs Radeon R9 280X

Intro

Compare those specifications to the Radeon R9 280X, which has a clock frequency of 850 MHz and a GDDR5 memory frequency of 1500 MHz. It also uses a 384-bit memory bus, and makes use of a 28 nm design. It features 2048 SPUs, 128 TAUs, and 32 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5770		108 Watts
Radeon R9 280X		250 Watts
	Difference: 142 Watts (131%)

Memory Bandwidth

Theoretically, the Radeon R9 280X should perform a lot faster than the Radeon HD 5770 overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 5770		76800 MB/sec
	Difference: 211200 (275%)

Texel Rate

The Radeon R9 280X is much (about 220%) faster with regards to anisotropic filtering than the Radeon HD 5770. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 5770		34000 Mtexels/sec
	Difference: 74800 (220%)

Pixel Rate

The Radeon R9 280X is a lot (more or less 100%) better at full screen anti-aliasing than the Radeon HD 5770, and will be able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 5770		13600 Mpixels/sec
	Difference: 13600 (100%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units by the core clock speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.